[  274.987344] ------------[ cut here ]------------
[  274.987419] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: unshare/425
[  274.987504] Modules linked in:
[  274.987561] CPU: 2 UID: 0 PID: 425 Comm: unshare Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  274.987653] Tainted: [W]=WARN
[  274.987706] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  274.987805] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  274.987871] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[  274.987995] RSP: 0018:ff82f7ea80747cc8 EFLAGS: 00010286
[  274.988057] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  274.988140] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fbbe00
[  274.988215] RBP: 0000000000000000 R08: ff3286d8432f24d0 R09: ff3286d84301602c
[  274.988291] R10: ff3286d844e4f118 R11: fefefefefefefeff R12: 0000000000000000
[  274.988365] R13: 0000000000000010 R14: ff3286d844e4f000 R15: ff3286d842fbbe00
[  274.988451] FS:  00007f14aa77b740(0000) GS:ff3286d8cd796000(0000) knlGS:0000000000000000
[  274.988527] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  274.988596] CR2: 000055ea3ef3c008 CR3: 0000000004d17004 CR4: 0000000000771ef0
[  274.988672] PKRU: 55555554
[  274.988718] Call Trace:
[  274.988762]  <TASK>
[  274.988809]  rtmsg_ifinfo+0x3c/0xa0
[  274.988875]  register_netdevice+0x889/0x9f0
[  274.988930]  register_netdev+0x1e/0x30
[  274.988985]  loopback_net_init+0x57/0xb0
[  274.989043]  ? vsock_sysctl_init_net+0xb6/0x140
[  274.989115]  ops_init+0x68/0x140
[  274.989172]  setup_net+0x85/0x150
[  274.989228]  copy_net_ns+0xf5/0x200
[  274.989284]  create_new_namespaces+0x117/0x2f0
[  274.989378]  unshare_nsproxy_namespaces+0x85/0xb0
[  274.989441]  ksys_unshare+0x346/0x5e0
[  274.989499]  __x64_sys_unshare+0x12/0x20
[  274.989555]  do_syscall_64+0x104/0xfc0
[  274.989614]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  274.989710] RIP: 0033:0x7f14aa876bcb
[  274.989766] Code: 73 01 c3 48 8b 0d 2d 82 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d fd 81 0f 00 f7 d8 64 89 01 48
[  274.989897] RSP: 002b:00007ffedae06ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
[  274.989973] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f14aa876bcb
[  274.990046] RDX: 0000000000000000 RSI: 00007ffedae06820 RDI: 0000000040000000
[  274.990130] RBP: 00007ffedae06e40 R08: 00007ffedae06a10 R09: 0000000000000000
[  274.990206] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000040000000
[  274.990281] R13: 0000000000000000 R14: 00000000ffffffff R15: 000055ea2e75eb68
[  274.990355]  </TASK>
[  274.990409] ---[ end trace 0000000000000000 ]---
[  274.991066] ------------[ cut here ]------------
[  274.991150] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/425
[  274.991233] Modules linked in:
[  274.991312] CPU: 2 UID: 0 PID: 425 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  274.991407] Tainted: [W]=WARN
[  274.991460] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  274.991529] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  274.991620] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[  274.991749] RSP: 0018:ff82f7ea80747d68 EFLAGS: 00010286
[  274.991811] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  274.991914] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fbbe00
[  274.991988] RBP: 0000000000000000 R08: ff3286d8432327d0 R09: ff3286d8478c2030
[  274.992060] R10: ff3286d844dfc118 R11: fefefefefefefeff R12: 0000000000000000
[  274.992164] R13: 0000000000000010 R14: ff3286d844dfc000 R15: ff3286d842fbbe00
[  274.992249] FS:  0000000027079400(0000) GS:ff3286d8cd796000(0000) knlGS:0000000000000000
[  274.992364] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  274.992466] CR2: 00007f97bd1d0000 CR3: 0000000001ca0005 CR4: 0000000000771ef0
[  274.992544] PKRU: 55555554
[  274.992602] Call Trace:
[  274.992665]  <TASK>
[  274.992710]  rtmsg_ifinfo+0x3c/0xa0
[  274.992767]  register_netdevice+0x889/0x9f0
[  274.992822]  __tun_chr_ioctl+0x83c/0x16c0
[  274.992882]  ? do_sys_openat2+0x9a/0xe0
[  274.992940]  __x64_sys_ioctl+0xa1/0xe0
[  274.992997]  do_syscall_64+0x104/0xfc0
[  274.993053]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  274.993125] RIP: 0033:0x47cc8d
[  274.993183] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
[  274.993311] RSP: 002b:00007ffcbe779c70 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  274.993393] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  274.993469] RDX: 00007ffcbe779cf0 RSI: 00000000400454ca RDI: 0000000000000005
[  274.993543] RBP: 00007ffcbe779cc0 R08: 0000000000000000 R09: 0000000000000000
[  274.993619] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcbe77a1c8
[  274.993696] R13: 00007ffcbe77a248 R14: 0000000000000002 R15: 0000000000543540
[  274.993773]  </TASK>
[  274.993820] ---[ end trace 0000000000000000 ]---
[  274.993900] ------------[ cut here ]------------
[  274.993959] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/425
[  274.994043] Modules linked in:
[  274.994106] CPU: 2 UID: 0 PID: 425 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  274.994196] Tainted: [W]=WARN
[  274.994249] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  274.994316] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  274.994385] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[  274.994511] RSP: 0018:ff82f7ea80747d60 EFLAGS: 00010286
[  274.994575] RAX: 00000000ffffffa6 RBX: 0000000000000000 RCX: 0000000000000000
[  274.994649] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fbbe00
[  274.994723] RBP: 0000000000000002 R08: ff3286d8432327d0 R09: ff3286d8478c2030
[  274.994796] R10: ff3286d844dfc118 R11: fefefefefefefeff R12: 0000000000000000
[  274.994870] R13: 0000000000000010 R14: ff3286d844dfc000 R15: ff3286d842fbbe00
[  274.994949] FS:  0000000027079400(0000) GS:ff3286d8cd796000(0000) knlGS:0000000000000000
[  274.995025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  274.995092] CR2: 00007f97bd1d0000 CR3: 0000000001ca0005 CR4: 0000000000771ef0
[  274.995172] PKRU: 55555554
[  274.995218] Call Trace:
[  274.995264]  <TASK>
[  274.995311]  rtnetlink_event+0x6e/0xb0
[  274.995366]  notifier_call_chain+0x6d/0x100
[  274.995431]  netdev_update_features+0x56/0x60
[  274.995493]  __tun_chr_ioctl+0xbf1/0x16c0
[  274.995549]  ? file_init_path+0x62/0x120
[  274.995606]  __x64_sys_ioctl+0xa1/0xe0
[  274.995661]  do_syscall_64+0x104/0xfc0
[  274.995716]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  274.995777] RIP: 0033:0x47cc8d
[  274.995831] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
[  274.995961] RSP: 002b:00007ffcbe779cb0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  274.996037] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  274.996117] RDX: 000000000000000f RSI: 00000000400454d0 RDI: 0000000000000005
[  274.996190] RBP: 00007ffcbe779d00 R08: 0000000000000000 R09: 0000000000000000
[  274.996263] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcbe77a1c8
[  274.996337] R13: 00007ffcbe77a248 R14: 0000000000000002 R15: 0000000000543540
[  274.996416]  </TASK>
[  274.996462] ---[ end trace 0000000000000000 ]---
[  274.996541] ------------[ cut here ]------------
[  274.996603] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/425
[  274.996685] Modules linked in:
[  274.996741] CPU: 2 UID: 0 PID: 425 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  274.996827] Tainted: [W]=WARN
[  274.996880] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  274.996947] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  274.997008] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[  274.997141] RSP: 0018:ff82f7ea80747c10 EFLAGS: 00010286
[  274.997202] RAX: 00000000ffffffa6 RBX: 0000000000000001 RCX: 0000000000000000
[  274.997276] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fbbe00
[  274.997349] RBP: 0000000000000000 R08: ff3286d8432327d0 R09: ff3286d844e4d030
[  274.997429] R10: ff3286d844dfc118 R11: fefefefefefefeff R12: 0000000000000000
[  274.997503] R13: 0000000000000010 R14: ff3286d844dfc000 R15: ff3286d842fbbe00
[  274.997583] FS:  0000000027079400(0000) GS:ff3286d8cd796000(0000) knlGS:0000000000000000
[  274.997662] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  274.997729] CR2: 00007f97bd1d0000 CR3: 0000000001ca0005 CR4: 0000000000771ef0
[  274.997805] PKRU: 55555554
[  274.997851] Call Trace:
[  274.997898]  <TASK>
[  274.997945]  rtmsg_ifinfo+0x3c/0xa0
[  274.998000]  __dev_notify_flags+0xb1/0xf0
[  274.998056]  netif_change_flags+0x54/0x70
[  274.998118]  dev_change_flags+0x45/0x80
[  274.998173]  devinet_ioctl+0x607/0x7f0
[  274.998230]  inet_ioctl+0x229/0x240
[  274.998285]  ? __rtnl_unlock+0x35/0x60
[  274.998340]  sock_do_ioctl+0x75/0x140
[  274.998404]  __x64_sys_ioctl+0xa1/0xe0
[  274.998460]  do_syscall_64+0x104/0xfc0
[  274.998515]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  274.998579] RIP: 0033:0x47cc8d
[  274.998634] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00
[  274.998763] RSP: 002b:00007ffcbe779c90 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  274.998837] RAX: ffffffffffffffda RBX: 000000000000000f RCX: 000000000047cc8d
[  274.998911] RDX: 00007ffcbe779d00 RSI: 0000000000008914 RDI: 0000000000000006
[  274.998985] RBP: 00007ffcbe779ce0 R08: 0000000000000000 R09: 0000000000000000
[  274.999060] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcbe77a1c8
[  274.999139] R13: 00007ffcbe77a248 R14: 0000000000000002 R15: 0000000000543540
[  274.999214]  </TASK>
[  274.999261] ---[ end trace 0000000000000000 ]---
[  319.975426] ------------[ cut here ]------------
[  319.975567] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/425
[  319.975664] Modules linked in:
[  319.975724] CPU: 2 UID: 0 PID: 425 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  319.975820] Tainted: [W]=WARN
[  319.975875] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  319.975946] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  319.976015] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[  319.976159] RSP: 0018:ff82f7ea80747b58 EFLAGS: 00010286
[  319.976222] RAX: 00000000ffffffa6 RBX: 0000000000000041 RCX: 0000000000000000
[  319.976298] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fd5500
[  319.976396] RBP: 0000000000000000 R08: ff3286d8432327d0 R09: ff3286d844e4d030
[  319.976473] R10: ff3286d844dfc118 R11: fefefefefefefeff R12: 0000000000000000
[  319.976561] R13: 0000000000000010 R14: ff3286d844dfc000 R15: ff3286d842fd5500
[  319.976645] FS:  0000000000000000(0000) GS:ff3286d8cd796000(0000) knlGS:0000000000000000
[  319.976724] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  319.976796] CR2: 00007f97bd1d0000 CR3: 0000000030e42006 CR4: 0000000000771ef0
[  319.976874] PKRU: 55555554
[  319.976923] Call Trace:
[  319.976974]  <TASK>
[  319.977024]  rtmsg_ifinfo+0x3c/0xa0
[  319.977081]  netif_close_many+0xed/0x190
[  319.977398]  unregister_netdevice_many_notify+0x267/0x9d0
[  319.977478]  ? __queue_work+0x141/0x550
[  319.977547]  unregister_netdevice_queue+0x9e/0xd0
[  319.977615]  __tun_detach+0x591/0x5b0
[  319.977676]  tun_chr_close+0x3f/0xc0
[  319.977733]  __fput+0xe8/0x2c0
[  319.977797]  task_work_run+0x63/0xa0
[  319.977855]  do_exit+0x2c1/0xba0
[  319.977914]  ? ___sys_recvmsg+0xc6/0x100
[  319.977973]  do_group_exit+0x2d/0xc0
[  319.978031]  get_signal+0x82e/0x900
[  319.978090]  arch_do_signal_or_restart+0x77/0x2b0
[  319.978164]  exit_to_user_mode_loop+0x75/0x4a0
[  319.978239]  do_syscall_64+0x439/0xfc0
[  319.978299]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  319.978364] RIP: 0033:0x4c2d9e
[  319.978421] Code: Unable to access opcode bytes at 0x4c2d74.
[  319.978498] RSP: 002b:00007ffcbe779620 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  319.978580] RAX: 0000000000000050 RBX: 00007ffcbe7796b0 RCX: 00000000004c2d9e
[  319.978658] RDX: 0000000000000000 RSI: 00007ffcbe7796c0 RDI: 0000000000000007
[  319.978736] RBP: 00007ffcbe779630 R08: 0000000000000000 R09: 0000000000000000
[  319.978819] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffcbe7796a4
[  319.978894] R13: 00007ffcbe77a248 R14: 00007ffcbe7797f0 R15: 0000000000543540
[  319.978971]  </TASK>
[  319.979020] ---[ end trace 0000000000000000 ]---
[  319.979170] ------------[ cut here ]------------
[  319.979263] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#2: packetdrill/425
[  319.979355] Modules linked in:
[  319.979415] CPU: 2 UID: 0 PID: 425 Comm: packetdrill Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  319.979530] Tainted: [W]=WARN
[  319.979611] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  319.979728] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  319.979824] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[  319.980023] RSP: 0018:ff82f7ea80747bc8 EFLAGS: 00010286
[  319.980126] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  319.980256] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fd5500
[  319.980377] RBP: 0000000000000000 R08: ff3286d8432327d0 R09: ff3286d84694c030
[  319.980499] R10: ff3286d844dfc118 R11: fefefefefefefeff R12: 0000000000000000
[  319.980622] R13: 0000000000000011 R14: ff3286d844dfc000 R15: ff3286d842fd5500
[  319.980727] FS:  0000000000000000(0000) GS:ff3286d8cd796000(0000) knlGS:0000000000000000
[  319.980846] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  319.980935] CR2: 00007f97bd1d0000 CR3: 0000000030e42001 CR4: 0000000000771ef0
[  319.981029] PKRU: 55555554
[  319.981095] Call Trace:
[  319.981197]  <TASK>
[  319.981249]  unregister_netdevice_many_notify+0x877/0x9d0
[  319.981318]  unregister_netdevice_queue+0x9e/0xd0
[  319.981408]  __tun_detach+0x591/0x5b0
[  319.981474]  tun_chr_close+0x3f/0xc0
[  319.981546]  __fput+0xe8/0x2c0
[  319.981606]  task_work_run+0x63/0xa0
[  319.981664]  do_exit+0x2c1/0xba0
[  319.981722]  ? ___sys_recvmsg+0xc6/0x100
[  319.981780]  do_group_exit+0x2d/0xc0
[  319.981837]  get_signal+0x82e/0x900
[  319.981898]  arch_do_signal_or_restart+0x77/0x2b0
[  319.981965]  exit_to_user_mode_loop+0x75/0x4a0
[  319.982032]  do_syscall_64+0x439/0xfc0
[  319.982089]  entry_SYSCALL_64_after_hwframe+0x4b/0x53
[  319.982157] RIP: 0033:0x4c2d9e
[  319.982214] Code: Unable to access opcode bytes at 0x4c2d74.
[  319.982284] RSP: 002b:00007ffcbe779620 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
[  319.982389] RAX: 0000000000000050 RBX: 00007ffcbe7796b0 RCX: 00000000004c2d9e
[  319.982467] RDX: 0000000000000000 RSI: 00007ffcbe7796c0 RDI: 0000000000000007
[  319.982549] RBP: 00007ffcbe779630 R08: 0000000000000000 R09: 0000000000000000
[  319.982630] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffcbe7796a4
[  319.982727] R13: 00007ffcbe77a248 R14: 00007ffcbe7797f0 R15: 0000000000543540
[  319.982807]  </TASK>
[  319.982856] ---[ end trace 0000000000000000 ]---
[  319.990182] ------------[ cut here ]------------
[  319.990226] WARNING: net/core/rtnetlink.c:4523 at rtmsg_ifinfo_build_skb+0xc8/0x110, CPU#3: kworker/u16:0/12
[  319.990287] Modules linked in:
[  319.990311] CPU: 3 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G        W           7.1.0-rc4-virtme #1 PREEMPT(lazy) 
[  319.990376] Tainted: [W]=WARN
[  319.990399] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  319.990433] Workqueue: netns cleanup_net
[  319.990459] RIP: 0010:rtmsg_ifinfo_build_skb+0xc8/0x110
[  319.990500] Code: 80 00 00 00 e8 59 d9 ff ff 48 83 c4 38 85 c0 75 18 48 83 c4 08 4c 89 f8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 8b 48 08 eb b4 90 <0f> 0b 90 ba 02 00 00 00 4c 89 fe 31 ff e8 76 b2 fb ff b9 a6 ff ff
[  319.990589] RSP: 0018:ff82f7ea80067c78 EFLAGS: 00010286
[  319.990619] RAX: 00000000ffffffa6 RBX: 00000000ffffffff RCX: 0000000000000000
[  319.990666] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ff3286d842fd4e00
[  319.990707] RBP: 0000000000000000 R08: ff3286d8432f24d0 R09: ff3286d84789682c
[  319.990748] R10: ff3286d844e4f118 R11: fefefefefefefeff R12: 0000000000000000
[  319.990789] R13: 0000000000000011 R14: ff3286d844e4f000 R15: ff3286d842fd4e00
[  319.990832] FS:  0000000000000000(0000) GS:ff3286d8cd816000(0000) knlGS:0000000000000000
[  319.990872] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  319.990911] CR2: 0000561836ae62b8 CR3: 00000000033e7006 CR4: 0000000000771ef0
[  319.990954] PKRU: 55555554
[  319.990970] Call Trace:
[  319.990984]  <TASK>
[  319.991002]  unregister_netdevice_many_notify+0x877/0x9d0
[  319.991030]  default_device_exit_batch+0x318/0x390
[  319.991060]  ops_undo_list+0x10b/0x240
[  319.991085]  cleanup_net+0x1d7/0x2e0
[  319.991111]  process_one_work+0x162/0x360
[  319.991134]  worker_thread+0x16e/0x2d0
[  319.991155]  ? rescuer_thread+0x510/0x510
[  319.991178]  kthread+0xe1/0x120
[  319.991201]  ? kthread_park+0xa0/0xa0
[  319.991221]  ret_from_fork+0x16d/0x250
[  319.991243]  ? kthread_park+0xa0/0xa0
[  319.991267]  ret_from_fork_asm+0x11/0x20
[  319.991290]  </TASK>
[  319.991302] ---[ end trace 0000000000000000 ]---